Shimano xt m8100 12sp mtb chainsetcontinuing the legacy for mountain bikers everywhere, this stunning 12 speed chainset offers the ultimate range for every ride. It features a chainring ratio with 36 to 26 teeth and delivers almost unlimited possibilities to tackle whatever the trails have to throw at you. Its hollow forged crank arms make it incredibly tough for weaving around the mountain while also keeping its weight low.high performance 12 speed cranksetfor those who are drawn to unknown terrain, the chainrings feature dynamic chain engagement technology which holds your chain safely on the most aggressive of runs. This is the perfect upgrade for a guaranteed smooth, efficient and quieter drivetrain.features material crank arm, outer chainring anodised aluminium axle, inner chainring steel use mtb speed 12 speed number of chainrings 2 tooth count 36 26t chainline 48.8mm q factor 172mm recommended bottom bracket bb mt800 thread type bb mt800 pa pressfit weight 654g 175mm version a 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products.buy shimano components from chain reaction cycles, the world's largest online bike store.